Selective metal removal process for metallized retro-reflective and holographic films and radio frequency devices made therewith
First Claim
1. An identification device, comprising:
- a base layer;
a radio-frequency (RF) transponder comprising an RF chip and an antenna disposed on the base layer, wherein the antenna is in electrical communication with the chip; and
a metallized region;
wherein the metallized region has been selectively demetallized, such that the RF transponder is able to transmit and receive information.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for selectively removing metal from a metallized substrate (e.g., a metallized polymer film) and the formation of devices thereby are provided. The method involves selectively exposing the metallized surface to a demetallizing (i.e., an oxidizing) chemical solution. The metallized layer can be selectively exposed to the demetallizing solution using a flexographic printing process wherein printing rollers are used to transfer the demetallizing solution to the metallized surface. An identification device including, for example, a holographic, retro-reflective, or other metallized material and a radio-frequency transponder are also provided. The radio-frequency transponder includes an RF chip and an antenna in electrical communication with the chip. The identification device including the holographic image allows both electronic identification through the reading of identification data stored in the chip and optical identification via the holographic image.
66 Citations
27 Claims
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1. An identification device, comprising:
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a base layer;
a radio-frequency (RF) transponder comprising an RF chip and an antenna disposed on the base layer, wherein the antenna is in electrical communication with the chip; and
a metallized region;
wherein the metallized region has been selectively demetallized, such that the RF transponder is able to transmit and receive information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of forming a pattern in a metallized region, the method comprising:
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transferring a metal etching solution to portions of an exposed surface of the metallized region using a printing process;
allowing the etching solution to react with the metallized region to selectively demetallize the surface; and
washing the selectively demetallized surface. - View Dependent Claims (25, 26, 27)
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Specification